Transmission electron microscopy (TEM) is an indispensable research tool in fields such as materials science and nanotechnology. For researchers who are new to TEM, understanding its basic principles and operations is crucial for efficient utilization of this equipment. TEM testing mainly focuses on the microstructure characteristics of materials, including element distribution, phase composition, crystal defects, etc. These characteristics are manifested at the microscopic level as the size, shape, distribution of different phase grains, as well as the density and distribution of crystal defects. Through TEM, researchers can gain a deeper understanding of the internal structure of materials, thereby evaluating their properties and potential applications.
The principle of thermochromism mainly adjusts the input of solar radiation (wavelength concentrated in 190-3000nm) energy and the output of blackbody energy through windows based on the ambient temperature. Thermochromic materials will change their transparency, absorbance, and color when the temperature changes. Thermochromic can be used as a passive design strategy to adjust near-infrared transmittance while maintaining visible light transmittance, without the need for external energy or manual operation. Therefore, thermochromic smart windows have become a hot research topic in building energy-saving windows due to their simple structure and broad application prospects.
Small particle alumina powder has a wide range of applications in ceramics, chemical engineering, electronics and other fields due to its unique physical and chemical properties. However, in practical applications, small-sized alumina powder is prone to agglomeration, which refers to the phenomenon of powder particles adhering to each other and forming larger aggregates during storage, transportation, or use due to various factors. Causing its performance to be affected. The agglomeration phenomenon can lead to poor flowability and reduced dispersibility of the powder, affecting product quality.
Particle rearrangement and densification: In liquid-phase sintering, the generation of liquid phase and particle rearrangement are key steps in densification. Small particles have a large specific surface area and surface energy. After the liquid phase is generated, the solid phase is wetted by the liquid phase and infiltrates into the gaps between particles. If the amount of liquid phase is sufficient, the solid phase particles will be completely surrounded by the liquid phase and approximate a suspended state. Under the surface tension of the liquid phase, they will undergo displacement and adjustment of position, thus achieving the most compact arrangement. At this stage, the density of the sintered body increases rapidly
Heat treatment is a key step in the application process of 3D printing. So far, regardless of which 3D printing process is used, it involves several methods to varying degrees, such as powder cleaning, annealing, post curing, unsupported, polished, sandblasted, and colored. Heat treatment is also an important step in the application process of 3D printed parts, and can take various forms depending on the expected results, materials used, and preferred technology.
Scanning electron microscopy can be divided into thermal electron emission type and field emission type according to the different ways of electron generation. The filament used for thermal electron emission type is mainly tungsten filament electron microscopy. Field emission type The distinction between hot field emission and cold field emission.
